<p>iCAMS, a new mobile communication tool for cellular phones, uses location and schedule information. By analyzing communication logs and the results from questionnaires and user interviews, we evaluated our systemand found the following: 1) Location information is good for estimating the callee?s context, and enables serendipitous meetings. 2) The sorted list of communication channels in the callee's priority list helps callers and callees find a nexus between the caller's demands and the callee's wishes. 3) We should switch location-sensing methods according to distances in both real and mental space.</p>